Control from a Festo valve terminal

mgm
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09 Dec 2022 16:19 #259011 by mgm

Control from a Festo valve terminal was created by mgm

Some time ago I read something here in the forum about controlling FESTO valve terminals.

Who can tell me where I can find that?

Thanks!

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Aciera
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09 Dec 2022 16:39 #259012 by Aciera

Replied by Aciera on topic Control from a Festo valve terminal

If you are referring to the valve blocks connected by Profibus then this could be it:

forum.linuxcnc.org/10-advanced-configura...-and-profibus#223639

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tommylight
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09 Dec 2022 17:50 #259022 by tommylight

Replied by tommylight on topic Control from a Festo valve terminal

Also, RotarySMP uses Festo valves on his lathe, but i think those are normal valves with on/off control, not serial or anything-bus.
Not sure though...

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mgm
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11 Dec 2022 14:05 #259191 by mgm

Replied by mgm on topic Control from a Festo valve terminal

Thanks for the info ....

I have now downloaded the zip file for the Profibus and wanted to look with the demo, unfortunately without success ...

I have unzipped the zip and copied to my config folder and started via Linuxcnc the sim unfortunately I get an error message:

Debug file information:
setup_kins: cmd=loadrt trivkins
Note: Using POSIX realtime
motion.c: Creating unlock hal pins for joint 4
./profibus.hal:17: execv(pyprofibus-linuxcnc-hal): No such file or directory
./profibus.hal:17: waitpid failed pyprofibus-linuxcnc-hal profibus
./profibus.hal:17: pyprofibus-linuxcnc-hal exited without becoming ready
Unexpected realtime delay on task 0 with period 1000000
This Message will only display once per session.
Run the Latency Test and resolve before continuing.
8269
Stopping realtime threads
Unloading hal components
Note: Using POSIX realtime

Can anyone help me?

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Aciera
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11 Dec 2022 14:34 #259193 by Aciera

Replied by Aciera on topic Control from a Festo valve terminal

./profibus.hal:17: execv(pyprofibus-linuxcnc-hal): No such file or directory

seems that it can't find the file 'pyprofibus-linuxcnc-hal'. Are you sure the file is where you are telling it to look (ie the path set in 'profibus.hal') ?

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mgm
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11 Dec 2022 14:56 - 11 Dec 2022 15:25 #259194 by mgm

Replied by mgm on topic Control from a Festo valve terminal

yes the file "pyprofibus-linuxcnc-hal" is in the same place as the file "linuxcnc-demo.ini

this is the line 17 in the "profibus.hal"

loadusr -Wn profibus pyprofibus-linuxcnc-hal pyprofibus.conf

Last edit: 11 Dec 2022 15:25 by mgm.

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Aciera
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12 Dec 2022 07:11 - 12 Dec 2022 07:11 #259244 by Aciera

Replied by Aciera on topic Control from a Festo valve terminal

Not sure, maybe try with absolute paths. ie /home/<your-path-here>/pyprofibus-linuxcnc-hal

Last edit: 12 Dec 2022 07:11 by Aciera.

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andypugh
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14 Dec 2022 01:44 #259391 by andypugh

Replied by andypugh on topic Control from a Festo valve terminal

It's trying to execute pyprofibus-linuxcnc-hal. Is it an executable file?

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mgm
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15 Dec 2022 08:21 #259544 by mgm

Replied by mgm on topic Control from a Festo valve terminal

yes it is

I have now tried various ways to place the file without success!

I put this back for now!

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Aciera
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17 Dec 2022 10:07 #259722 by Aciera

Replied by Aciera on topic Control from a Festo valve terminal

make sure that 'pyprofibus-linuxcnc-hal' is the actual file name (ie no extension)
If it got saved as pyprofibus-linuxcnc-hal.py (ie with extension) it won't be foundl.

I find it useful sometimes to use 'cat' in the terminal:

$ cat /home/<yourpathere>/pyprofibus-linuxcnc-hal

if it can't find the file then there is something wrong with the filename.

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